(19)
(11) EP 2 322 295 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
31.12.2014 Bulletin 2015/01

(43) Date of publication A2:
18.05.2011 Bulletin 2011/20

(21) Application number: 10190117.1

(22) Date of filing: 05.11.2010
(51) International Patent Classification (IPC): 
B21C 37/02(2006.01)
B21K 1/76(2006.01)
A44C 9/00(2006.01)
B21J 1/02(2006.01)
 B21J 1/04(2006.01)
B21K 11/02(2006.01)
B23P 15/00(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 13.11.2009 JP 2009259573
11.06.2010 JP 2010134052

(71) Applicant: Mokumeganeya Co. Ltd.
Tokyo 150-0001 (JP)

(72) Inventor:
  • Takahashi, Masaki
    Shibuya-ku Tokyo 150-0001 (JP)

(74) Representative: Betten & Resch 
Theatinerstrasse 8
80333 München
80333 München (DE)

   


(54) Metal manufacturing method, apparatus of the same and metal object


(57) When manufacturing a ring and a pendant from a single metal plate, the number of the twist is determined so that a predetermined feature pattern may occurs regardless size on the surface of a male ring and a female ring. The feature pattern depends on the method of the laminating of two or more metal plates, the kind of metal plate, thickness, etc. for example. The number of times of twist concerned is determined based on these information,







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